使用助手从用户中检索子集合

Question

我有一个项目，每个用户可以有多个费用。费用存储在用户文档中。

例如，用户的文档如下所示：

{
"username": "Joe Bloggs",
"expenses": [
{
"title": "bucket of paint",
"price": 9.99
},
{
"title": "large mop",
"price": 5.49
}
]
}

我正在尝试构建一个助手来输出每个用户的每个费用，最终在页面上会像这样：

Joe Bloggs | Bucket of paint | 9.99
Joe Bloggs | Large mop | 5.49
Cynthia Smith | Small paintbrush | 3.99

如果我只是想获取用户列表，我会这样做：

Template.Expenses.helpers({

  allExpenses(){
  var allUsers = Meteor.users.find().fetch();
  return allUsers;

  }

});

...所以现在我将用户放在一个数组中，我将如何遍历每个用户以输出他们的费用详细信息？

非常感谢，

Answer 1

看看这个解决方案，在评论中解释

users = [{ // assuming you have something like this array
  "username": "Joe Bloggs",
  "expenses": [{
    "title": "bucket of paint",
    "price": 9.99
  }, {
    "title": "large mop",
    "price": 5.49
  }]
}, {
  "username": "Dave Peterson",
  "expenses": [{
    "title": "Small Brush",
    "price": 4.59
  }, {
    "title": "Stud finder",
    "price": 19.99
  }]
}];
var expenses = [];
users.forEach(function(currentUser) { // loop over users
  currentUser.expenses.forEach(function(currentExpense) { // loop over current users expenses
    var newExpense = { // create a new expense with needed properties
      username: currentUser.username,
      title: currentExpense.title,
      price: currentExpense.price
    };
    expenses.push(newExpense); // add new expense to expenses array
  });
});

// print the expenses as needed
expenses.forEach(function(expense){
 console.log([expense.username, expense.title, expense.price].join(" | "))
});

Answer 2

您可以使用 {{#each}} 或 {{#each in}} 直接遍历您的用户

<template name="Expenses">
    {{#each user in allUsers}}
        {{#each expense in user.expense}}
        <p>{{user.username}} | {{expense.title}} | {{expense.price}}</p>
        {{/each}}
    {{/each}}
</template>

Template.Expenses.helper(){
    allUsers(){
        var allUsers = Meteor.users.find().fetch();
        return allUsers;
    }
}

使用助手从用户中检索子集合

Using helper to retrieve subcollections from Users

javascript

mongodb

meteor

meteor-blaze